-=> Quoting Scott Currier to The Real Tom Marks <=-
 SC> The tdma phones xmit during the time slice which would normally be
 SC> only 1/6 or  1/3 of a second each second, the cdma phones I beleive are
 SC> xmitting  continuously which would account for the cdma phone not
 SC> lasting as long. 
  SC> I don't beleive the 1 watt figure on the tdma phone, I've never seen
 SC> or heard  any digital phone rated at anything higher than 600mw. What's
  SC> the model and  make of that phone you're talking about.
 
The regular TDMA phones, (ie nokia 2120/2160) don't last longer than
the CDMA phones, they have around a 2 hour talk time with a 1200mah
nimh battery and 48 hour standby in all digital mode.  The CDMA lasts
5 hour talk time and 48 hour standby in all digital mode, transmitting
continously so that is pretty good.  The 1watt figure is for a 2190
nokia tdma/gsm digital.  Ziggy has a 2110e which is basically the
same I believe, could you check in your manual for that ziggy?
 SC> That is pretty neat, the Oki's have that too, in fact some of them
 SC> come with  the earpiece with a microphone mounted a few inches down the
 SC> cord so you can  walk and talk with the phone in your pocket, nice
 SC> idea. 
I had 2 different ones.  I had a motorola which had the earbud then a
mike 4" down on the wire just hangine, then I had another with an "arm"
of sorts which placed the mike about 1" from your mouth which made it
work alot better then the other one.  It looked generic but it worked
great :)
 
 SC> I haven't seen anything in print that says that either tdma or cdma
 SC> will  provide a better signal to noise ratio than fm using the same
 SC> amount of power.  I beleive that with the same path, power, and
 SC> antenna, fm will beat the  digital, especially with weak signals. The
 SC> digital phone may not be able to get enough information thru to
 SC> reconstruct the voice but the fm signal, being  narrower and not
 SC> containing as much information may be quite readable. If  anyone can
 SC> quote any source comparing the s/n ratio of fm versus cdma, I'd be 
 SC> intererested in reading it. 
 SC> Handheld phones, analog amps phones, have 7 steps of attenuation,
 SC> usually from  .006 watts up to .6 watts. On the oki phones and some
 SC> others you can turn the  status monitor on to see how much power the
 SC> phone is running as well as what  channel it's on.
 SC> 200mw to 600 mw is a 3 fold or about a 4.5 or 5 db increase in signal
 SC> strength, not a huge difference.
Even though the digital signal might not get a better signal to noise ratio
(I know it's true of TDMA< not sure how CDMA compares) it makes mcuh better
use of the signal strenght that is there.  At least CDMA does, TDMA
gets all crappy.  Digital signals rarely drop, have no static, no crosstalk,
and are generally trouble free.  And they have power usage from .000006
watts to .200 watt I belive that is what  Iread :)
... All your future lies beneath your hat.
~~~ ReneWave v2.00+
--- Renegade
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